package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService{
	@Autowired
	private DishService dishService;
	@Autowired
	private SetmealService setmealService;

	@Override
	public void remove(Long id){
		LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
		dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
		int count1 = dishService.count(dishLambdaQueryWrapper);
		//如果已经关联菜品，抛出应该业务异常
		if (count1 > 0){
			throw new CustomException("当前分类下已关联了菜品，无法直接删除");
		}

		//查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
		LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
		setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
		int count2 = setmealService.count(setmealLambdaQueryWrapper);
		if (count2 > 0) {
			throw new CustomException("当前分类下已关联了套餐，无法直接删除");
		}
		//正常删除分类
		super.removeById(id);
	}
}